The purpose of this book is to bring together in one volume the body of information on the theory and practice of engine testing and test plant design to which any engineer responsible for work of this kind must have access. The current concern with environmental matters has given a fresh impetus to the development of the internal combustion engine. Test procedures are becoming ever more complex and demanding. This presents a challenge to the test and development engineer, since while mastering these new techniques they must still have at their finger tips all the traditional skills associated with engine testing. Such basic matters as the mounting of the engine, coupling it to the dynamometer and dealing with the exhaust can give rise to intractable problems, misleading results and, on occasion, to disastrous accidents. This book, essentially practical in nature, will meet this need.